Using Colored STL for Geometry Export

[Jörg 29]

Simulation and meshing packages such as STAR-CCM+, ICEM CFD or OpenFOAM can import colored STL files which is an export format supported by CAESES/FFW: Boundary surfaces (inlet, outlet and symmetry plane etc.) can be individually colored in CAESES/FFW so that the color information is transferred to the meshing software - for quick and automatic detection of these important surfaces.

 

Here are different options for coloring surfaces in different situations (see also the screenshots):

• Trimesh Input: Click the edit button of a trimesh input surface and set the color.
  
• Boolean Operations: The colors of the participating solids are also transferred (e.g. the symmetry plane in the screenshot "solid_merged" is red because the initial box is colored red)
  
• Extrusion: If you extrude surfaces onto a plane and additionally close the result (e.g. for lids), the extrusion itself as well as the generated closed surface can also hold individual colors.
  

 

Cheers

Joerg

[Mr. Bastian Ahlf 2]

Hey Joerg,

 

my intention is to import the caeses geometry via spaceclaim into ansys mesher. The import of the geometry and named selection by colors works fine with one exception. A single color or named selection is always chosen for the entire solid and not for the intended surface.

 

I would be grateful for your help.

 

 

Cheers

 

Bastian

[Jörg 29]

Hi Bastian,

 

Do you have a simple example (CAESES fdb project etc.)? It should not be a big deal to assign colors to patches, I guess.

[Mr. Bastian Ahlf 2]

Hi Bastian,

 

Do you have a simple example (CAESES fdb project etc.)? It should not be a big deal to assign colors to patches, I guess.

 

How should i share the file with you?

[Ceyhan Erdem 14]

Hi Bastian,

 

Can you please send your project to erdem@friendship-systems.com?

 

I will give a look and try to figure out the problem.

 

Cheers

Ceyhan

[Ceyhan Erdem 14]

Hi Bastian,

 

In SpaceClaim there is a certain situation that we observe. When no color is assigned in CAESES; within SpaceClaim strangely one of the face assigned colors is directly assigned to the entire volume.

 

And that was the problem you were facing. In order to resolve the problem I will recommend you to assign a color to the entire BRep.

At the bottom of the BRep menu , under Display Options you can find the location where you can create/assign BRep body colors

 

 

 

However those colors assigned to each operation becomes a Named Selection for a face group

 

 

 

 

 

Note: This problem is not observed in DesignModeler

 

Cheers

Ceyhan